The Celkon Q5K Transformer was a popular entry-level smartphone in the Indian market, released around 2015. Powered by a Spreadtrum (UNISOC) chipset and running Android 4.4 KitKat, it catered to users seeking an affordable dual-SIM device for basic communication and apps. Over time, this model is notoriously prone to issues like bootloops after a failed update, unresponsive touchscreen, persistent malware (often from installed apps), and sudden IMEI loss leading to no network signal. Flashing the official Celkon Q5K Transformer stock ROM is the most effective solution to unbrick your device, wipe out all software-related problems, and restore it to its original factory state. This guide provides the official SPD flash file and a precise method to successfully reinstal the firmware.
CRITICAL NOTICE BEFORE YOU PROCEED: Flashing this firmware will erase all data on your Celkon Q5K Transformer. We strongly advise you to backup your contacts, messages, photos, and files beforehand if your device is still accessible. This process is intended for advanced users. Follow the steps meticulously to avoid permanently damaging your device. Your device must have at least 50% battery charge to prevent shutdown during flashing.
Celkon Q5K Transformer Quick Specifications
- Device Name
- Celkon Q5K Transformer
- Release Year
- 2015
- Chipset (SoC)
- Spreadtrum (UNISOC) SC7731 (Codename: Shark)
- Display
- 5.0-inch FWVGA (854 x 480 pixels)
- Battery
- 2000mAh (removable)
- RAM & Storage
- 512MB RAM / 8GB ROM (expandable via microSD)
- Original OS
- Android 4.4 KitKat
- Special Features
- Dual-SIM support, Dual-Camera setup, OTG support
Required Downloads for Flashing
You will need to download and install the following tools and files on your Windows PC before starting the flashing process.
- SPD Upgrade Tool: Download SPD Upgrade Tool
- Spreadtrum USB Drivers: Download SPD Drivers
- Firmware Package: Download the file provided in the table below.
Celkon Q5K Transformer Firmware Download
| Filename / Version (Build Date) | Android Version | Size | Download Link |
|---|---|---|---|
| Q5K_Transformer_V11 (Oct 2015) | 4.4 KitKat | ~544 MB | Download Google Drive |
How to Flash Celkon Q5K Transformer Firmware
- Install Drivers: Extract and install the Spreadtrum USB Drivers on your PC. Disable driver signature enforcement if needed.
- Prepare Tool: Extract the SPD Upgrade Tool and run it as Administrator.
- Load Package: In the tool, click “Load Package” and select the
.pacfile from the extracted firmware folder. - Connect Phone: Power off your phone. Remove the battery, wait 5 seconds, and reinsert it. Press and hold the “Volume Down” key and while holding it, connect the phone to the PC via USB cable.
- Flash: The tool should detect the phone in “Boot” mode. Click the “Start” button to begin flashing. Do not disconnect until you see a “Success” or “Pass” message.
For a detailed, step-by-step guide with screenshots on using the SPD Upgrade Tool, please refer to our comprehensive pillar article: How to Use the SPD Upgrade Tool to Flash Your Smartphone.
Troubleshooting Common Celkon Q5K Transformer Problems
Flashing the stock firmware resolves most software issues. Here are some common problems specific to the Q5K Transformer and their solutions:
- Phone Stuck on Celkon Logo (Bootloop): This is often caused by a corrupted system partition or a failed OTA update. A complete firmware flash using the SPD Upgrade Tool, as described above, will rewrite all partitions and solve this issue.
- No Network Signal / IMEI Null: The Q5K Transformer’s NVRAm partition is fragile and can get corrupted, leading to IMEI loss. After flashing the stock ROM, you will likely need to write your IMEI back using an engineer tool like SN Write Tool or Maui META. Your original IMEI is printed on the phone’s box and underneath its battery.
- Touchscreen Not Working After Flash: If the touchscreen becomes unresponsive after a flash, it means the firmware package you used did not contain the correct touchscreen driver (TP driver) for your specific hardware variant. Ensure you are using the exact firmware provided in this guide, as it is tailored for the Q5K Transformer model.
- Phone Not Entering Flash Mode: If the SPD Tool doesn’t detect your phone, ensure you have installed the Spreadtrum drivers correctly. Try different USB ports (preferably USB 2.0), a different cable, and hold the Volume Down button firmly while connecting. On some PCs, you may need to manually install the drivers from the Device Manager when the phone is connected in boot mode.
Frequently Asked Questions (FAQ)
- Will flashing this stock ROM remove FRP lock on my Celkon Q5K Transformer?
- Yes, flashing the official stock firmware will completely wipe the device, including the Google FRP (Factory Reset Protection) lock. This is an effective method to bypass FRP on your Q5K Transformer if you’ve forgotten your Google account credentials.
- Can I root my Celkon Q5K Transformer after flashing this firmware?
- Yes, but root methods for older Spreadtrum devices like the Q5K Transformer are complex and often involve patching the boot image with tools like Magisk. Proceed with caution, as an error can lead to a bootloop.
- Why did my phone lose IMEI and how can I restore it?
- IMEI loss is a common issue on Spreadtrum devices due to corruption of the NVData partition. You can restore IMEI on your Celkon Q5K Transformer by using tools like SN Write Tool. You will need your original 15-digit IMEI numbers from the phone’s box.
- Does flashing this firmware void warranty?
- Since the Celkon Q5K Transformer is a very old model, it is almost certainly out of its official warranty period. Flashing the official stock ROM provided by the manufacturer does not void warranty, as it restores the device to its original software state.
- What should I do if the download link is broken?
- If the Google Drive link provided for the Celkon Q5K Transformer firmware is down, please leave a comment below this article, and we will update it with a new mirror link as soon as possible.
Conclusion
Flashing the official Celkon Q5K Transformer stock firmware is the definitive solution for resolving persistent software crashes, bootloops, and network issues. This process effectively unbricks your device, removes any malware, and returns it to a clean, stable state of Android 4.4 KitKat. We recommend bookmarking our site for future firmware and tool updates. If you encountered any broken links or have specific questions about the flashing process, feel free to comment, and our community will assist you.
